{"id":"CVE-2026-90453","title":"A file-upload handler redirects the authenticated client's browser to a URL taken directly from that same request's Referer header, without validating it against the application's own origin","summary":"A file-upload handler redirects the authenticated client's browser to a URL taken directly from that same request's Referer header, without validating it against the application's own origin. This allows an authenticated attacker to craf…","severity":"medium","cvss":5.1,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","cwe":["CWE-601"],"vendor":"CISA","product":"Malcolm","affected":["Malcolm < v26.06.0"],"published":"2026-09-11","updated":"2026-09-18","sourceUpdated":"2026-09-18T19:40:31.053","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90453","references":[{"url":"https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-254-01.json","label":"ics-cert@hq.dhs.gov"}],"tags":["nvd","cve.org"],"epss":0.00225,"epssPercentile":0.13452,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-14T12:54:30.614277Z"},"cvssSource":"cna","ingestedAt":"2026-09-14T15:23:07.429Z","slug":"CVE-2026-90453","body":"## Overview\n\nA file-upload handler redirects the authenticated client's browser to a URL taken directly from that same request's Referer header, without validating it against the application's own origin. This allows an authenticated attacker to craft a request that causes another user's browser to be redirected to an arbitrary external destination after completing an upload.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":28.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}